[llvm-dev] LLD default page size for arm32

[Tobias Hieta via llvm-dev]

Hello,

In the recent days we have been debugging a really thorny issue where
binaries build with clang and linked with lld was just "Killed" when
started on a specific armv7 device we ship on.

After quite a bit of head scratching it turns out that the kernel on this
device ships with a 32k default page size (getconf PAGESIZE) and lld uses
4k default page size.

We fixed this by passing -zmax-page-size=0x10000 to lld.

The default page size in GNU ld for arm is 64k so binaries linked with ld
just worked on this device.

I put the question in the discord lld channel and after a bit back and
forth I think it's better to discuss it here.

Is 4k the right default for lld on Arm32? Does anyone know if there is a
strong reason to not change this?

Since we have a workaround I am not in a hurry to change this - but if
nothing else I hope this email will help someone else finding the solution
to the problem I had.

Thanks,
Tobias
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